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How to prevent corrosion of metal valves and synthetic materials valves
May 08, 2018

As we all know, the corrosion damage of metal has a considerable impact on the valve's duration, reliability and service life. The effect of mechanical and corrosive factors on metal greatly increases the total wear volume of the contact surface. The total amount of wear on the surface of the valve during operation.

During the operation of the valve, the surface of the friction is worn and destroyed by the results of the simultaneous mechanical action and the chemical or electrochemical interaction between the metal and the environment. For valves, the climate conditions of the pipes are complex; the occurrence of hydrogen sulfide, carbon dioxide and some organic acids in the medium of oil, natural gas and oil layer water increases the destructive power of the metal surface, and thus rapidly loses its working capacity. It

The chemical corrosion of metals depends on the temperature, the mechanical load of the friction parts, the sulfide contained in the lubricating material, the duration of the stability of the acid resistance and the continuous time of the contact with the medium, the catalysis of the metal to the nitriding process, the conversion rate of the molecule to the metal by the corrosion of the corroded material. Therefore, the anticorrosion methods (or measures) of metal valves and the application of synthetic material valves have become one of the themes of the valve industry. It


1. Anticorrosion of metal valves is understood to be coated on metal valves to protect their uncorroded conditions (such as lacquers, pigments, lubricants, etc.), so that the valve is not corroded in the process of manufacture, preservation, transportation, or in the whole process of its use. The method of anticorrosion of metal valves is determined by the required protection period, transportation and preservation conditions, valve structure characteristics and materials, of course, to take into account the economic effect of antisepsis. Such

There are 4 main anticorrosive methods for metal valves and their parts: 1. The volatile corrosion inhibitors are placed in the vapor atmosphere (wrapped with a hindrance paper, blowing the air through the chamber and so on). 2. Use the blocked water and alcohol solution. 3. Coating the thin layer of anticorrosive (protective) material on the surface of the valve and its components. 4. Smear the thin film or polymer thin film on the surface of the valve and its components. (Note: at present, valve manufacturers widely use lubricating materials and water resistance to prevent corrosion. Such

Two. The application of material valves is superior to metal valves in many corrosive conditions, first of which is corrosion resistance, followed by net weight. As for its strength, it depends on the shape, arrangement and quantity of the reinforced fiber. Generally speaking, the greater the percentage of fibers, the greater the strength of synthetic materials.